Periscope.



J, HUMBREOHT.

Pmscomi, APPLIATION .FILED JUNEV'T, 1910.

@76,3708 mmm Nm, 22, wm.

Fig/, Fig* Fm.

on n :einer er onreine.

manen @freiem-s Patented Nov. 2?, 191.0.

lib oli tolto/fn may it. known that. drinne Tf tonnerre", citizen o0 the. Gernnin ingire, and ree'ident oit Gross-Lichterfelde, neer lerlin, v Gen many, 'have invented certein new and u setui improvements in leriseopes, ot which the ollowingr a. epecilicntion.

My invention relates to ohjeet .sighting enpnrnftus eenecielly for u in snbnnirine sind sulnnergniie bonte end nos tor it. pose the production oi :in instrument w'nch allows the obi vntion of an innige oi' the object viewed either hy ineens oii an ocular with one. eye or on n. ground glass preferably with both eyes. ,For nllovmng such double use of the instrument sinne is. provided in ac cordnncey Ywith thisinventi'on with an adjust( e receiver Within the 1nstrinnent ens and :i ground gemein such arrangement with reltition to each other that depending upon the :idjnstn'ient et Suid casing' :in innige oi' the object. viewed nifty be observed either on said ground gloss or throuoh said ocular.

An enibodiinei'it. oit en ins uinentin ec cordance with this invention is represented on the annexed drawing in vJl'iich-a itt-Figure l shows n lateral view ot the instrument. partly in :iXi-nl section, the ad instable receiver bein` illustrated in the posillon in which it allows the observation oi' the ininge through the ocular. liig. 2 shows the vinstrument likewise in lateral View and axial-section with the receiver in 'the position `tor observation of the iinngge on the ground `glnss. llfig. 3 is e iafterztlvinv of the instrument. looiedet et n. riht. :ingle to the direction oi. view supposed the of Figs. l and 2.

in the embodiment oi the instrument the oenlor is shown :is o .so-celled ni'igulnr-ocnlnr con'iirising two parte a7 t) :arranged rectannhirly 'to each other. The ground glass is shown Vin forni of n. lens c being provided on its outer side with n. plain ground image surface CZ. The ground gloss lens cis co-y ordinated to the further lens e :ingularly disposed to said Lgirotnid glass ,tens and torni ing e magnifying giass. n

Between the ground lglass system and the oenlz'ir system :1. double sided reliecting mir rer .is provided which 'turns onenii to the .lenses of the ocular and tl.. y the lenses of the ground glass system. The

-nrovided 'with an' ocular.

tune i?, 19in.

E, NEAR BERLIN, (EILMAN, ASSIGNOR GGERZ AKTXENGESELLSCHET, OF FRIE- ennieeorn.

Serial no. eiwitten.

double retieeting mirror is shown as being formed troni the rectangular prism. 7" with silver eoeted hypotennse surface, which is covered by :i glass-plate o forming a mirror silvered on its back side contazetingwith the silvered hypotennse surface ofthe prism. 6o

This plete f/ made so thin that the oloserver is junnbie to perceive double images produced; by retiection'o-n the fron-t and on thel beck surface of the gliss-plate Ocular, ground. glass system and double reflecting mirror or prism and glass-plate system are? arrm'iged'within n easing /L rotatably disposed within e chamber of the mein casing of the instrument, said chamber being provided with an openingfor observation Witter tightly closed by n' protecting glass z'. The casing' fz. provided with e -stnd Z water tightly carried through the n'iziin casinghand provided with n lever 7c allowing the rotation of the casing it from outside tle main casing of the ilistrtnnent.

ln Fig. S tivo ditlercnt positions of lever 7 nre indicnttnl corresponding to the 'two dii- Yferent positions ot the casing lz. Within 'the nnzin using shown in Figs. l sind 2. The special errnngeinent of the oculzir and of the ground ,glass s vsteni with relation to the double sided reflector f, y] allows` in A simple nnnn'iei the observation through the ocular on the one hand and on the ground glues on the other hund without alteration ot' the position ol' the observer. For vthis purpose it is only necessary to construct. the optical elements for the ocular observation in such n lnnnner thnt the point of vision is chosen in nrcordnnce with the conditions of the ground glass system und vice versn.

The innige'formingy elements of; the instrument. nre onlyy indicated diegrnnnnaticnlly in Figs. Il. and of the drawing es consistii'ig` ot n. trinng'ulnr p' 'sin m an object glass n and reversing lens o for the reversion of the objectJ glass innige in the plane` of diaphrziginy). The lust named optical elements are :irrni'iged within the main cese g of the instrnnient.

llllnit l clnini is:

. l. Object sighting apparatus especially for use in submarine and submergible boats eomprising a niziin casing, an innige formingop- 105 tical device therein end'a receiver, the image forming optical device adapted to receive reys of light and to direct saine to the receiver for observation, the receiver comprising a casing carrying'an'ocular and a ground glass and adjustable Within the main casing in such a manner that depending upon the adjustment of said casing an image .of the object viewed may be observed either on saidl ground glass or through said ocular.

2. Object sighting apparatus especially for use in submarine and submergible boats comprising a main casing, an image forming optical device therein and a receiver, the image vforming optical device adapted toreceiveA rays of' light and tol direct same to the receiver. for observation, ythe receiver comprising acasing carrying' an ocular and a ground cular.

` either on said ground glass or "through said 3. Object sighting apparatusespecially for use in submarine and submergible boats coniprisinp' a main casing, a image forming optical -fievice therein and a receiver, the image formin optical device adapted to receive rays or light and to directjsame to the receiver for observation, th'e receiver comprising a casing carrying :an ocular; a ground glass, a ldouble sidedreieting mirror and means fpr rotating/said casing Within the main casing'the plane of thedouble sided rei'iiecting mirror substantially coinciding with \the axis of rotation of the ocular and ground glass carrying casing and turning one reiectinfrjside 'toward the ocular and the other toward' the -giround glass.

4. Object ghting apparatus especially for use in submarine. and submergible boats com.

prising a main casing, an image forming optical device therein and a receiver, the image forming optical device adapted to receive rays of light and to direct same to the receiver for observation, the receiver comprisingA aycasing carrying an l'ocular, a ground glass, a prism having a surface forming a separating Wall between the ocular and the ground glass, said prism surface being provided ivitli a transparent cover, a double sided reflecting layer between said prism surface and transparent cover and means for rotating said casing Within the inain casing, the plane of the double sided reflecting layer substantially coinciding with the axis of rotationof its carrying casing.

5. Object sighting apparatus especiallyj for use in submarine and submergible boats comprising a main' casing, an image forming optical device therein and a receiver, the image forming optical device adapted to ,receive rays o? light and to direct same to the4 receiver for observation, the receiver coinprisinfr a casingcarrying an ocular, a ground glass, a prism' having a surface .forming a separating wall between the ocu- -lar and the ground glass, a reflecting coating on said prism surface, a thin lass-plate pro- '1 vided on one side With a re ecting coating,

said coating contacting with said coatedy prism surface and means for rotating said casing withinthe main casing, the prism surface contacting with the thin glass-plate substantially coinciding with the axis of rotation of the rotatable casing.

6. Object sighting apparatus especially Y `for use in submarine andsubmergib e boats comprising a main casing, an image forming Ioptical device therein and a receiver, the image forming optical device adapted to receive rays of light and to direct same to the receiver for observation, the receiver comprising a casing carryin an ocular and a groun glass and rotatab elwithin the main casing of the instrument, thel ocular and the ground glass being arranged in such a manner that on suitable rotation of said casing an image of the' object viewed may be observed either on the ground glass or tlirou h the ocular Without materially altering t 'e position of the eye of the observer.

In testimony whereof 1 havesigned this specification inthe presence of two subscribing Witnesses.

J1 ULES HUMBREOHT.

lVitnesses HENRY HAsrnn, WOLDEMAR `HAUPT. 

